The minimum number of record movements required to merge five files A (with 10…

Use the optimal merge pattern: repeatedly merge the two smallest files, because each merge cost is the sum of the sizes of the two files being merged.

Initial sizes in increasing order: 5, 10, 15, 20, 25.

1. Merge 5 and 10: cost = 15, new sizes = 15, 15, 20, 25.
2. Merge 15 and 15: cost = 30, new sizes = 20, 25, 30.
3. Merge 20 and 25: cost = 45, new sizes = 30, 45.
4. Merge 30 and 45: cost = 75.

Minimum total record movements = 15 + 30 + 45 + 75 = 165.

Therefore, the correct answer is 165.